Special Functions: Horn:unique design for the path to ensure stability,practicablity and durablity,the technic of black paint is the guardian of cauterization-resistant and durability. Wheels:the were made once with the imported raw material polyurethane,and also with the durable ball bearing,all of this make it more stable and durable. Appearance:A new strong and durable vision will bring to you for the black horn and orange wheels. Application range:The hardness of the tire is 90A-95A and suitable temperature is -35-80,this series were suggested to apply to many environment and many fields.